Hi there - just posting my recently acquired (from the trash pile) Super Lemans. Serial # is
N0N5202 as best as I can tell. I'm not too well versed in older components but here's a rundown of what I could see: Diacompe side pulls with "0480" stamped on them; Derailers are Suntour VX (front) VX GT (rear), pedals are interesting onesided almost MTB looking MKS QRK1, Sugino cranks, double rings and a bash guard looking outer ring with the sugino crown emblem; SR bars and "centurion" labeled stem; Suntour perfect 6 speed FW and araya 27 x 1 1/4 wheels with sunshine hubs; Suntour barcons. The frame is labeled Tange #5.
Here is a shot after some cleanup and new bits:
And a blurry shot of the headbadge
I know the 70's stuff is still a bit up in the air, I hope this makes some sense.